Multiple choice

Directions: Find the missing term of the series given below. 810, 576, 392, 252,150, _____.

  1. 90

  2. 100

  3. 70

  4. 80

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Differences: 810-576=234, 576-392=184, 392-252=140, 252-150=102. Second differences: 234-184=50, 184-140=44, 140-102=38. The second difference is decreasing by 6. Next second difference = 32. Next first difference = 102 - 32 = 70. 150 - 70 = 80.

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